Canister provided with rip-wire opening device



P. BOGNER June 6, 1944.

CANI'STER PROVIDED WITH RIP-WIRE OPENING DEVISEv Filed Feb. 15. 1941 Patented June 6, 1944 CANISTER rRovmED WITH BIP-WIRE V OPENING DEVICE Peter Bogner, Oxford, England, assignor toSaml.

Hanson & Son, Limit v British company ed, London, England, a

Application February 15, 1941; serial No. 379,085

InfGIreat Britain February13, 1940 (Cl. 22o-44e) 12 Claims.

This inventionl is for improvements in or re- Vnotexposed to the Contents of the canister.

Another object is to facilitate opening the canvfurther Objectis to provide a seamed canister havingV av rip-wire for cutting a sufliciently .large opening in theend-closure of the canister to permitv removal of the contents, with the ripwire so mounted as not to be exposed to the contentsof the canister-and not to interfere substantially with 4the `function of theseam securingthe end closure to the canisterbody. c

With vthese objects in View the invention'consists in providing a canister formed'with a Wirereceiving fold' extending along Atheboundary of a portion of the canister that Vis to be movable when the canister has Vbeenopened to 'permit re- Inoval of the contents', vand aripwire disposed in'said fold, with the side walls of the fold pressed -together in such mannerthat the rip-wire is indented -into the material of said-v walls. The pressing together ofthe wallsof the wire-receiving fold serves to'maintainthe `rip-wire in its desired location and also assists in isolating the Vrip-wire from exposure to the contents ofthe vcanister since the rip-wire is almost completely .i v.surrounded by the walls ofthe'fold.;` Further, the material o the canisteris strengthened by the pressing together of said side-wallsuso that the adjoining portions of .the canister ,on oppolsite sides of the fold behave substantially .asif they .were formed in; oneA continuous piece ,without .thefold although they areiseparablc after I The aforesaid fold may be formedlintheimaterial of the end-closureor inthe material of the body-of the canister in suchmanneras tocxtendf around thelatter. 1 Certain preferredior-Ins of construction inaccordance with the invention are illustrated in the accompanyng drawing-and will' now be derscrbedbi Way of examlle'.; ;.4 f v In the drawing, j

Figure .1 is a broken elevation View showing portions of the body'and end-closure of a seamed canister; with the fold containing the rip-wire formed in theend-closure adjacent to the seam and around a shoulder surrounding the usual central depression in the end-closure;

Figures 2 and 3 'are' views vsimilar to Figure 1, showing modified constructions in' which the form of the shoulder is changed;V

Figure 4 is a view similarto Figure 1, showing a further modic'ation in which no shoulder vis provided;Y j

Figure 5`isa view similar to Figure 1, showing 'yet another modification in Vwhich the fold containing the rip-wire is formed in the material ofthe body of the canister;

' gFig'ure 6'is a'perspective view 'on a scale smaller than that of Figure 1, showing partof the upper end of the canister' of Figure '1 including the end portions oi lthe'fold through one of which the rip wire'protrudes to the outside'fof the canister, part of the body andend closure being broken away to show the sections through these parts, and

Figure 7 isa vdetail view showing a modified formation of the fold near itsen'd "portions, as it appears before .the rip-wire is inserted and the side walls ofthe fold are pressedt'ogether. Like reference'V numerals 'indicate like parts throughout the drawing." 1n Figure lthe body of the canister is indicated at I Il `andthe 'end-closure at VI I. `The end of the body IB isformedwith'the usual seaming ange I2'wliich is interfolded with a marginal seeming iiange VI3 formed on the end closure II. The 'latteris formed inknow'nmanner with a central depressionwhereof thebottorn and side walls 'are indicated at I`4"and` I5 respectively. The material of the endclosure II, which like the "body 4 IIJ is of sheet metal, is `continued outwardly from the central depression I4, IIS yin the form of an upwardlyand' outwardly#inclinedfnarrow V'shoulder I6 'extending around the `'centraldepression. Betweenthe shoulder I64 and theniarginal ange IS thereis Vformed in the material of theend closure al fold I 'I extending substantially" around the shoulder la and having side walls la and ls.

which are pressed together throughout the depth o f theffold. In effect the vfold II constitutes an filpstanding bead. VThe ripfw'ire `is indicated at ZIJand'it WiHLbesen that"it-isinterposed between the side. walls AI8 and I9, s spaced from the' extremities of thebead provided by the vfold J'II, and, due to the pressing together of said walls, is indented into thematerialof them toform,

thin places 2 and 22 constituting lines of weakening extending along the sides of the fold Il throughout the length of the fold. In other words, the rip-wire 20 is embedded in the fold II and is disposed between locations above and below it. at which .the side walls I8 and I9 are pressed into :engagement with one another.

The fold II defines the boundary of a portion of the canister which is to be movable to permit removal of the contents when the canister is opened. The said movable -portion fof #the canister comprises )the central depressioni -I4,

' co-pending application Serial No. 322,748 filed I5, the narrow shoulder I6L landpart of the wire c ,l

pfacturef the endzclosure. The closure II may bearing fold I'I. Since these tparts have'a'radial extent greater than the internal'radius of the body I0, no inwardly-projecting parts `suchas might impede removal of 'the contents 'of the canister are left when the said movable portion is moved away from the body of the canister. The actual extent of the said movableportion is of course determined by the lineV o'f ripping.

v'As will lb`e 'seen fromFigure 'the fold I'Irdoes not, extend completely around vthe end closure 'II, but is made discontinuous at one `place'to 'form a gap 2,3. 'The foldhas sloping end walls 2"4'r and 2:5 at'opposite ends ofthe gap, andthe end wall 24 'isformed with 'an aperture, as .indicated at26`in'Figu re`7, through'which one end ofthe'rip-wire,'2 0"projects to the 'outside of the canister. The 'aperture is displaced from the material adjoining 'the kfold I'I in an outward 'direction'that is'to say, along 'the depth ofuthe fold, so that the pressing together `of the side `walls I8fa'ndI9 of Jthe fold will not tend to split the sheet metal in the neighbourhood of the en'dw'all`24 as might'occur if the aperture extended up to the material 'adjoining'thejfold The outward displacement of the said 'aperture also"'fa ':ilitates 'sealing thespac'e'between the inserted rip-.wire and '.the edge of the aperture, as well Jas helping to avoid exposure ofthe aperturetothe contents 'of the canister. The projecting en'djofy the rip-Wire may be'bent inwardly as shown 'at 2'I vand formed with a loop 28 which may be anchored by solder or the like 29 lto'the centralportion of the end closure Il. The other 'end Lof lthe rip-wire 20 may .convenientlylbeleftinside the canister since kthe wire '20 is grippedalong its vwhole length between the side walls .I8 and I9 of ,the'fold The other end 'wallj 25ofthefold at the gap 23 mayhave only a slight inclination'to the'general'planeof the end-closure as -shown in -full lines, due tothe 7th-March 1940, .maybe employed in the manube seamed to the body I 0 by means of the apparatus described and claimed in my co-pendingjapplication Serial No.,192,989 filed 28th February 1'938 'on 'which issued Patent No. 2,250,002. Preferably a gasket 30 of sealing composition is interposed between the marginal ange I3 ofthe end-closure and the seaming flange I2 of the body to assist in ensuring that the -seam is airtight, and the gasket 30 may be continued across the line of engagementbetween the walls I8 vand I9 of-thefold, indicated at 3| in Figure 1.

Figures 2 vand V3 illustrate modied constructions which correspond closely with that of Figurel Yexcept that'the narrow shoulder formed aroundthecentral depression in the end closure is `modified in shape, and a corresponding modication is 'made in the shape ofthe portion of 'thebody I0 against which the shoulder engages. In Figure 2 there is shown a shoulder 32 vwhich is inclined downwardly and outwardly from the central depression' I4, I5, that is to say, the shoul- Yder is'inclinedoppositely to the shoulder I5 of "Figure 1. The'adjacentportion of the body I0 is forced into the recess below the kshoulder as Y'indicated at 33, so that there is arm engagement between the shoulder 32 andthe portion 33 of the'bodyl I0. In Figure 3 theshoulder instead of 'being inclinedis madevflat as shown .ai-,'34 [and Iit engages with a portion 35 of the 'body IIJ whichis more or less flattened to ensurelrm engagement with the shoulder .34. 'I'he Aconstructions of Figures 24 and. 3 valso diferfrom ythat of `Figure `1 in thatthe-shoulders 32 and 34 are ofastraight formation as vviewedin crosspressingtogether of the walls I8 and I9, or it sureijalongthe:outer. line' of lweakenin'g'22.`v When the material has "been ripped along the whole length 'ofthe fold I"I,^the1,novable part ofthe end closure will only Vbe connected to the 'body I0' byg'tljlejmaterial atthe gap 'and this materiaPWilIseryeas a 'hinge about which the mov- 'able jportion "of fthe 'end-'closure "may: pivot v.in 'moving' awawfrom'rthebdy l0.

' *Pullingrothe rip-wireasnescribed"above, to

section, `while the-shoulder I6 of Figure l is of varcuate form in cross-section. Y

'-In themodicationillustrated in Figure 4 the wire-receiving fold is shown at-36 and it includes Iside ywa1lsr3'I and -38 `which f are pressed vtogether ,.similarly-to'- the walls I8 and I 9 of Figure 1 to en- .close :the rip-wire'20. Instead of being separated bya shoulderrfromthe central depression I4, I5 ofthe'end-:closure the fold 36.has` its side-wall 3l -formed .as :a 'direct continuation of thetwall I 5 of -the .central depress-ion. f As. in the .rstedescribed f constructions' .the ifold; is .disposed above :the seam 'and the imarginal ilange I3 extends from the '(-areformeld as ini-Figures llto 3-'by thespressingito- -lgether off the lwalls3l and 38 causing the ripwire 2in to thelindentedirtothematerial ofesai'd-walls'. In the constructionofFigure 4`the1pres'sng 'together-ofthe walls 31 and38'of thefoldfa'below lt'he` rip-wire 120 V"may be suflicient Lto isolate g the 4ripewire from Aexposure -to the-contentsjof--the canister, or, as an additional 'measure for-ftlis "purposajthe sealing'gasket 30 f which .lis Lshown as stoppingshortof' t-hej-ni'pf39 between firewalls-31 and 38,` may be lcontinuedv inwardlyto cover the nip 39. 'I'he nip'39 mayalsolbe covere'dfby laction' of the body I0. vdisposed as near as may be convenient to the at 40jY is formed in the material of the body Illinstead of` in the material of the end-closure Ily of the jcanister', The fold 40 is formed on the outside ofthe `body and has opposed portions or vside-Walls 4I and 42 Which'are pressed together, wit-ha rip-wire between them, in such manner as to indent the rip-wire into the material of the walls 4| and 42 and` form thin places 43 and 44 constituting lines of weakening corresponding to Ithoseshown at 2| and 22 in Figures 1 to 4. The construction'of VFigure 5 is particularly applicable to a canister -having a seamless body. In this case the fold 40 may be made continuous so as -to extend completely around the-body I and an aperture may be` formed in one of the opposed portions or walls-4| and 42 for the passage of one end of the rip-wire 20 to the-outside of the canister. Alternatively the fold may be completelyfinterrupted as shown in Figure 6, or reduced in depth as described later in connection with Figure 7, to form end-walls one of which is apertured for the passage of one end of the ripwire to the'l outside of the canister. With the 'fold completely interrupted asl, aforesaid the construction of Figure 5 may be applied to a canister whereof` the body has a longitudinal seam, the latter being arranged to pass through the gap formed by the interruption of the fold 40.

In theconstructionof Figure 5 a lacquer coating may be' applied so as to bridge the nip 45 between the opposed walls 4I and 42 of the fold in order to supplement the effect of the pressing together of. said walls in preventing exposure of the rip-wire 20 to the contents of the canister. rIhe lacquer covering the nip may form part of the usuallacquer coating applied to the interior of the'body IU. bent over, if desired, in a fashion similar to that `described in connection with the fold 36- of Fig'- ure 4, so as to lie against the neighbouring `por- The fold 40 is preferably seamv l2, .i3 while being sufficiently displaced vtherefrom to avoid interferenceV with the operation of seaming the end-closure l l to the body lll, and in this case the fold may be bent over in the direction away from the seam.

Figure 7 shows a modified formation of the fold in which, instead of being completely interrupted to form a gap 23 as in Figure 6, the fold I1 is reduced in depth as shown `at 46. For clearness,

Figure '7 shows the fold before insertion of the Wire and beforefits iside-walls have been pressed together, and it will be seen that between the reduced portion 46 and the portions of the fold that are of maximum depth inclined end-walls 41 and 48 are formed. The aperture 26 is formed in the end-wall 4l and is thus displaced outwardly from the material of the canister adjoining the fold H, so as to secure the advantage previously described.

It will be appreciated that the invention provides an improved form of canister embodying a rip-wire opening device with the rip-wire held securely in the desired location for its proper operation and also prevented from being exposed to the contents of the canister. The improved con- Further the fold 40 may be t struction is moreover susceptible of'i being' produced jin large quantities quickly and? cheaply. In thev constructions of Figures 1 to 4, the press'- ing'togetherfof 'the side walls of the fold ensures anew and 'improved co-actionbetween the endclosure Il and body 10, because-the material of the end-closure in the neighbourhood; of the fold is made more rigid, with the portions ofthe material on opposite sides -of the fold behavingsubstaintiallyf'as if they were Vdirect continuations of one another, as viewed in cross-section. This permits theformation ofaseam which is somewhat tighterthanrwould otherwise be possible in a constructionv embodying the rip-wire, and, what is even more important,v increases theA pressure exerted `between the end-closure and the body at locations between the rip-wire and the interior ofthe canister. The shoulders I6, y32 and 34 of Figures 1 to 3,-bypressing against'the end of the body HL: each form a seal, as described in my co-pending application ySerial No. 191,230, filed February 18, 1938, serving to .isolate the rip-wire '2U from exposure tothecontents ofthe canister. In the present improved forms of V,construction the increased rigidity of thematerial in the neighbourhood of the fold causesv the pressure, 'and therefore the-effectiveness, vof such seal to be increased. Similarly,- in the construction of Figure `4, the pressure exerted between the side- 4wall jl5 offthe central depression andthe interior of the end :of the Vbodyvlll is increased ,by the greater rigidity of the material in the=neighbourhood of the'fold'. g i ---...Itf. is to be understood that the invention is notlrestricted to the precise constructional detail'slshown intheV drawing.

1. A canister comprising'a body,gan end-closure secured to said body, a `fold* extending around the-,canister and including side-walls formed in one of `theparts constituted bythe body. andend-closure to define the boundary of aportion of ther canister-which, is to be movable toV permit, removal of the contents when the `canister is opened, and a rip-wire contained in said fold, with the side-walls of the fold pressed together suiiiciently lto indent `the rip-wire into the material of said side-walls for substantially thelength of the rip wire. l 2. In a canister comprisinga body, an endclosure securedv to said b.ody, and means for ,ripping the canisteropen alongA a line contained inoneof the parts constituted by the body and end-closure,x the combination of a fold formed inthe material ofthe canister and extending f,xlnafcanister-*of the rip-opening type com'- .fprising fabody'. and an end-closure secured. `to

said body, and having on one of the parts constituted by the body and end-closure a line of ripping bounding a portion of the canister which is to be movable to permit removal of the contents when the canister is opened, the combination of a closed fold extending around the canister and including side-walls formed in the material of the canister along the line of ripping, and a rip-wire interposed between and gripped by said side-walls and indented into the material thereof to weaken said material along the line of ripping, said side walls being in contact with each other on opposite sides of the wire. 

